/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Karla', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  background-color: hsl(204, 43%, 93%);
  color: hsl(218, 22%, 67%);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

/* Container */
.container {
  width: 100%;
  max-width: 635px;
  margin: 0 auto;
}

/* Price Grid */
.price-grid {
  display: grid;
  grid-template-columns: 1fr;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* Header Section */
.header {
  background-color: white;
  padding: 40px;
}

.header h1 {
  color: hsl(179, 62%, 43%);
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 20px;
}

.header h2 {
  color: hsl(71, 73%, 54%);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 15px;
}

.header p {
  color: hsl(218, 22%, 67%);
  line-height: 1.7;
}

/* Subscription Section */
.subscription {
  background-color: hsl(179, 62%, 43%);
  color: white;
  padding: 40px;
}

.subscription h2 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
}

.price {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.amount {
  font-size: 32px;
  font-weight: 700;
}

.period {
  opacity: 0.7;
}

.subscription p {
  margin-bottom: 30px;
  opacity: 0.9;
}

.sign-up-btn {
  width: 100%;
  background-color: hsl(71, 73%, 54%);
  color: white;
  border: none;
  padding: 15px;
  border-radius: 5px;
  font-family: 'Karla', sans-serif;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.sign-up-btn:hover {
  background-color: hsl(71, 73%, 60%);
}

/* Why Us Section */
.why-us {
  background-color: hsl(179, 62%, 43%);
  opacity: 0.8;
  color: white;
  padding: 40px;
}

.why-us h2 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
}

.why-us ul {
  list-style: none;
}

.why-us li {
  margin-bottom: 5px;
  opacity: 0.8;
  font-size: 14px;
}

/* Footer */
footer {
  margin-top: 40px;
  text-align: center;
}

.attribution {
  font-size: 11px;
  text-align: center;
}

.attribution a {
  color: hsl(228, 45%, 44%);
}

/* Responsive Design */
@media (min-width: 768px) {
  .price-grid {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
  }
  
  .header {
    grid-column: 1 / -1;
  }
  
  .subscription {
    grid-column: 1 / 2;
  }
  
  .why-us {
    grid-column: 2 / 3;
  }
}

/* Additional responsive adjustments */
@media (max-width: 767px) {
  .header,
  .subscription,
  .why-us {
    padding: 30px 25px;
  }
  
  .header h1 {
    font-size: 20px;
  }
  
  .header h2 {
    font-size: 16px;
  }
  
  .amount {
    font-size: 28px;
  }
}